The yottabit is a multiple of the unit bit for digital information or computer storage. The prefix yotta (symbol Y) is defined in the International System of Units (SI) as a multiplier of 1024 (1 septillion, short scale), and therefore
1 yottabit = 1024bits = 1000000000000000000000000bits = 1000 zettabits.
The yottabit has the unit symbol Ybit or Yb.
The yottabit is closely related to the yobibit, a unit multiple derived from the binary prefixyobi of the same order of magnitude, which is equal to 280bits = 1208925819614629174706176bits, or approximately 21% larger than the yottabit.
As this exceeds the range of a 64-bit integer, yobabit can only be recorded on 128-bit systems.

This is an excerpt from the article Ybit from the Wikipedia free encyclopedia. A list of authors is available at Wikipedia.

The article Ybit at en.wikipedia.org was accessed 13 times in the last 30 days. (as of: 11/05/2013)

The compressed point is (x,Ybit) where Ybit ∈ {0,1}. We define PointCompress(Ev
,b ,P) to be a function that compresses the point P = (x,y) on curve Ev,b and
outputs (x || Ybit) which is the compressed representation of (x,y). Also, we define
...

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